[PATCH v7 0/4] Support configuring hash functions

[Helin Zhang <helin.zhang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

These patches mainly support configuring hash functions. In detail,
 - It can get/set global hash configurations.
  * Get/set symmetric hash enable per flow type.
  * Get/set hash function type.
 - It can get/set symmetric hash enable per port.
 - Four commands have been implemented in testpmd to support
   testing above.
   * get_sym_hash_ena_per_port
   * set_sym_hash_ena_per_port
   * get_hash_global_config
   * set_hash_global_config

It also uses constant hash keys to replace runtime generating hash keys. Global initialization is added to correctly put registers to an initial state.

v3 changes:
* Removed renamings in rte_ethdev.h.
* Redesigned filter control API and its relevant structures/enums.
* Renamed header file from rte_eth_features.h to rte_eth_ctrol.h.
* Remove public header file of rte_i40e.h specific for i40e.
* Added hardware initialization function during port init.
* Used constant random hash keys in i40e PF.
* renamed the commands in testpmd based on the redesigned filter
  control API.

v4 changes:
* Fixed a bug in testpmd to support 'set_sym_hash_ena_per_port'.

v5 changes:
* Integrated with filter API defined recently.
* Remove all for filter API definition, as it has already defined
  and merged recently.

v6 changes:
* Flow type strings are used to replace Packet Classification
  Types, to isolate hardware specific things.
* Implemented the mapping function to convert RSS offload types to
  Packet Classification Types, to isolate the real hardware
  specific things.
* Removed initialization of global registers in i40e PMD, as global
  registers shouldn't be initialized per port.
* Added more annotations to get code more understandable.
* Corrected annotation format for documenation.

v7 changes:
* Remove swap configurations, as it is not allowed by hardware design.
* Put symmetric hash per flow type and hash function type into
  'RTE_ETH_HASH_FILTER_GLOBAL_CONFIG', as they are controlling global
  registers which will affects all the ports of the same NIC.

Helin Zhang (4):
  ethdev: code style fixes
  i40e: use constant as the default hash keys
  i40e: support of controlling hash functions
  app/testpmd: app/testpmd: add commands to support hash functions

 app/test-pmd/cmdline.c            | 334 ++++++++++++++++++++++++++++++++++++++
 lib/librte_ether/rte_eth_ctrl.h   |  72 +++++++-
 lib/librte_pmd_i40e/i40e_ethdev.c | 312 ++++++++++++++++++++++++++++++++++-
 3 files changed, 704 insertions(+), 14 deletions(-)

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1.8.1.4